55107615651987 has 4 divisors (see below), whose sum is σ = 73476820869320. Its totient is φ = 36738410434656.

The previous prime is 55107615651857. The next prime is 55107615651997. The reversal of 55107615651987 is 78915651670155.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 55107615651987 - 2¹⁹ = 55107615127699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55107615651997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9184602608662 + ... + 9184602608667.

It is an arithmetic number, because the mean of its divisors is an integer number (18369205217330).

Almost surely, 2^{55107615651987} is an apocalyptic number.

55107615651987 is a deficient number, since it is larger than the sum of its proper divisors (18369205217333).

55107615651987 is a wasteful number, since it uses less digits than its factorization.

55107615651987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18369205217332.

The product of its (nonzero) digits is 79380000, while the sum is 66.

The spelling of 55107615651987 in words is "fifty-five trillion, one hundred seven billion, six hundred fifteen million, six hundred fifty-one thousand, nine hundred eighty-seven".